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| author |  Jakub Kicinski <kuba@kernel.org>
| 2023-03-09 22:18:59 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org>
| 2023-03-09 22:22:11 -0800 |
| commit | d0ddf5065ffef45f8fce4001abe0206081c7ff10 (patch) | |
| tree | ea83817cbe9fc25261eae87b85afd9fe086f479e /arch/s390/include/asm/rwonce.h | |
| parent | Merge branch 'sctp-add-another-two-stream-schedulers' (diff) | |
| parent | Merge tag 'net-6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netd... (diff) | |
| download | linux-d0ddf5065ffef45f8fce4001abe0206081c7ff10.tar.gz linux-d0ddf5065ffef45f8fce4001abe0206081c7ff10.tar.bz2 linux-d0ddf5065ffef45f8fce4001abe0206081c7ff10.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Documentation/bpf/bpf_devel_QA.rst
b7abcd9c656b ("bpf, doc: Link to submitting-patches.rst for general patch submission info")
d56b0c461d19 ("bpf, docs: Fix link to netdev-FAQ target")
https://lore.kernel.org/all/20230307095812.236eb1be@canb.auug.org.au/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'arch/s390/include/asm/rwonce.h')
| -rw-r--r-- | arch/s390/include/asm/rwonce.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/s390/include/asm/rwonce.h b/arch/s390/include/asm/rwonce.h new file mode 100644 index 000000000000..91fc24520e82 --- /dev/null +++ b/arch/s390/include/asm/rwonce.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_S390_RWONCE_H +#define __ASM_S390_RWONCE_H + +#include <linux/compiler_types.h> + +/* + * Use READ_ONCE_ALIGNED_128() for 128-bit block concurrent (atomic) read + * accesses. Note that x must be 128-bit aligned, otherwise a specification + * exception is generated. + */ +#define READ_ONCE_ALIGNED_128(x) \ +({ \ + union { \ + typeof(x) __x; \ + __uint128_t val; \ + } __u; \ + \ + BUILD_BUG_ON(sizeof(x) != 16); \ + asm volatile( \ + " lpq %[val],%[_x]\n" \ + : [val] "=d" (__u.val) \ + : [_x] "QS" (x) \ + : "memory"); \ + __u.__x; \ +}) + +#include <asm-generic/rwonce.h> + +#endif /* __ASM_S390_RWONCE_H */ |